package com.sky.aspect;


import com.sky.annotation.AutoFill;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.time.LocalDateTime;

@Component
@Aspect
@Slf4j
public class AutoFillAspect {
    //切入点表达式
    @Pointcut("execution(* com.sky.mapper.*.*(..))&& @annotation(com.sky.annotation.AutoFill)")
    public void  autoFillPointCut(){

    }
    @Before("autoFillPointCut()")
    public void autoFill(JoinPoint joinPoint) throws NoSuchMethodException, InvocationTargetException, IllegalAccessException {
        log.info("开始进行公共字段自动填充");
        //获取数据库操作类型
        MethodSignature signature = (MethodSignature) joinPoint.getSignature();//方法签名对象
        AutoFill autoFill = signature.getMethod().getAnnotation(AutoFill.class);//获得方法上的注解对象
        OperationType operationType=autoFill.value();//获取数据库操作类型
        //获取被拦截方法的参数-实体对象
        Object[] args = joinPoint.getArgs();
        if (args==null || args.length==0){
            return;
        }
        Object entity = args[0];
        //准备赋值数据
        LocalDateTime now = LocalDateTime.now();
        Long currentID= BaseContext.getCurrentId();

        //根据当前不同的操作类型，为对应的属性通过反射来赋值
        if (operationType==OperationType.UPDATE){
            Method setUpdateUser = entity.getClass().getDeclaredMethod("setUpdateUser", Long.class);
            Method setUpdateTime=entity.getClass().getDeclaredMethod("setUpdateTime", LocalDateTime.class);


            setUpdateTime.invoke(entity,now);
            setUpdateUser.invoke(entity,currentID);



        }else{
            Method setCreateTime=entity.getClass().getDeclaredMethod("setCreateTime", LocalDateTime.class);
            Method setCreateUser=entity.getClass().getDeclaredMethod("setCreateUser", Long.class);
            Method setUpdateTime=entity.getClass().getDeclaredMethod("setUpdateTime", LocalDateTime.class);
            Method setUpdateUser = entity.getClass().getDeclaredMethod("setUpdateUser", Long.class);
            setCreateTime.invoke(entity,now);
            setCreateUser.invoke(entity,currentID);
            setUpdateTime.invoke(entity,now);
            setUpdateUser.invoke(entity,currentID);
        }
    }
}
